Use symfony/polyfill-ctype

Use the polyfill for every package that uses cytpe functions.

Author: BackEndTea

composer.json

@@ -17,6 +17,7 @@
     ],
     "require": {
         "php": ">=5.3.9",
+        "symfony/polyfill-ctype": "~1.8",
         "symfony/translation": "~2.4"
     },
     "require-dev": {